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A certain electronic transition from an excited state to ground state of the H2 atom in one or more step gives rise to three lines in the ultra violet region of the spectrum. Hiw many lines does this transition produce in the infrared region of the spectrum
Four lines are observed in the ultraviolet region of the spectrum. These corresponds to the transitions 5 --->1 , 4--->1 , 3---->1 , 2---->1 The possible transitions in the IR region are 5 ----->4 , 5----->3 , 4----->3 Thus, in the infrared region of the spectrum, 3 lines are produced.
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